<template>
	<view>
		<!-- 自定义的搜索组件 -->
		<my-search @click="gotoSearch"></my-search>
		
		
		
		
		<view class="soroll-view-container">
			<!-- 左边 -->
			<scroll-view scroll-y="true" class="left-scroll-view" style="{height:wh + px''}">
				
				<block v-for="(item, i) in cateList" :key="i">
					<view :class="['left-scroll-view', i === active ? 'active' : '']" @click="activeChange(i)"> {{item.cat_name}} </view>
				</block>
			
				
			</scroll-view>
			
			<scroll-view scroll-y="true" style="{height:wh + px''}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2, i2) in cateLevel2" :key="i2" >
					<!-- 二级分类的标题 -->
					<view class="cate-lv2-title">/{{item2.cat_name}}/</view>
					
					<!-- 三级分类的标题 -->
					<view class="cate-lv3-list">
						<!-- 三级分类的item -->
						<view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" 
						@click="gotoGoodsList(item3)">
							
							<!-- 三级图片 -->
							<image :src="item3.cat_icon.replace('dev','web')" ></image>
							
							<!-- 三级文字 -->
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
				
				
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins:[badgeMix],
		data() {
			return {
				//当前设备可以的高度
				wh:0,
				cateList:[],
				active:0,
				//二级列表
				cateLevel2:[],
				
				scrollTop:0
			};
		},
		onLoad(){
			const sysInfo = uni.getSystemInfoSync()
				
				this.wh = sysInfo.windowHeight - 50
				
			// 定义一个方法
			this.getCateList()
			
		},
		
		methods:{
			//获取分类列表数据
			async getCateList(){
				const{ data:res } = await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status !==200) return uni.$showMsg()
				this.cateList = res.message
				
				//二级分类赋值
				this.cateLevel2 = res.message[0].children
			},
			activeChange(i){
				this.active = i
				
				//重新为二级分类赋值
				this.cateLevel2 = this.cateList[i].children		
				
				this.scrollTop = this.scrollTop === 0 ? 0 : 1
			
			},
			//三级列表跳转商品列表页面
			gotoGoodsList(item){
				uni.navigateTo({
					url:'/subpak/goods_list/goods_list?cid=' + item.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url:'/subpak/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
.soroll-view-container{
	display: flex;
	
	.left-scroll-view{
		width: 120px;
		
		.left-scroll-view{
			background-color: #f7f7f7;
			line-height: 60px;
			text-align: center;
			font-size: 12px;
			
			&.active{
				background-color: #aaaccc;
				position: relative;
				
			&::before{
				content:'';
				display: block;
				width: 3px;
				height: 30px;
				background-color: #c00000;
				position: absolute;
				top:25%;
				left:0;
				
			}
			}
			
		}
		
	}
	
}

.cate-lv2-title{
	font-size: 12px;
	font-weight: bold;
	text-align: center;
	padding: 15px 0;
}

.cate-lv3-list{
	display: flex;
	flex-wrap: wrap;
	.cate-lv3-item{
		width: 33.33%;
		display: flex;
		flex-direction: column;
		justify-content: center;
		align-items: center;
		margin-bottom: 10px;
		
		
		
		image{
			width: 60px;
			height: 60px;
		}
		text{
			font-size: 12px;
		}
	}
}
</style>
